82835domain: NAppears in sequencesNumber of positive integers <= 2^n of form x^2 + 7 y^2.at n=19A054151Ceiling(Gamma(n/3)).at n=27A284997Ceiling(Gamma(2n/3)).at n=13A284999Numbers k such that 6*k + 1 is a prime that can be written as p*q + 2, with p and q being consecutive primes.at n=22A342564